If I can paint a wall in 20 min and my friend can paint a wall in 30 min. How many minutes would it take for us to paint a wall working together.

Answers

Answer 1

Answer: [tex]12\ \text{min}[/tex]

Step-by-step explanation:

Given

It takes 20 min and 30 min for  a person and his friend to paint a wall individually  i.e.

In 1 min they cover [tex]\frac{1}{20}[/tex] part and [tex]\frac{1}{30}[/tex] part of wall respectively.

If the work together, 1 minute work is

[tex]\Rightarrow \dfrac{1}{20}+\dfrac{1}{30}\\\\\Rightarrow \dfrac{3+2}{60}\\\\\Rightarrow \dfrac{5}{60}[/tex]

Time required will be reciprocal of it

[tex]\Rightarrow \dfrac{60}{5}=12\ \text{min}[/tex]


Related Questions

a dice cube has 6 sides that are numbered 1-6. If the cube is thrown once, what is the probability of rolling an odd number?

Answers

Answer:

3/6 or 1/2

Step-by-step explanation:

1, 2, 3, 4, 5, 6

3 odd #s and 3 even #s

3/6 are odd which means 3/6 probability of rolling an odd #

Answer:

1/2

Step-by-step explanation:

There are 3 odd numbers 1,3,5 so 3/6 which equals 1/2

:DDDDD

HELP!!! Please ASAP

Answers

Answer:

which

Step-by-step explanation:

which one is answer

Which measure of central tendency best describes the data? 45, 45, 46, 52, 100, 43, 98, 46, 81 median only mean only either mean or median​

Answers

Answer:

Median only

Step-by-step explanation:

I also go to k12 and did this quiz.

sorry if I'm already late

Question 9 of 10
Fill in the blank. In the triangle below, y=
decimal places.
- Round your answer to two
47"
y
35
ze
Answer here

Answers

Answer:

y = 51.32º

Step-by-step explanation:

z = 180 - 47 - 90

z = 43º

sin43 = opp/hyp

sin43 = 35/y

y = 35/sin43

y = 51.32º

Calculate the interquartile range from the given box plot

Answers

Answer:

IQR = 3

Step-by-step explanation:

The interquartile range (IQR) is the difference between the upper quartile Q₃ and the lower quartile Q₁

Q₃ is the value at the right side of the box , that is Q₃ = 62.5

Q₁ is the value at the left side of the box. that is Q₁ = 59.5

Then

IQR = Q₃ - Q₁ = 62.5 - 59.5 = 3

I need help please hurry it needs to get turned in asappppp

Answers

Answer:

Did you attach a screenshot of the question? If so, we cannot see it

Step-by-step explanation:

Answer:

11.25

Step-by-step explanation:

24-(5-9+18)÷7 (step by step explanation do fastttt)​

Answers

Am stunned on how you can't do 5th grade math and you appear in High School... But I'll help

According to PEMDAS (Parenthesis, Exponents, Multiplication/Division, and Addition/Subtraction) you wanna do 5-9+18 first. That gives you 14. After 14, you do 14/7 which gives you 2. And finally, you do 24 - 2 which gives you 22.

45 + 9/4 + 4 + 12/20

Answers

45 + 2.25 + 4 + 0.6 =

45 + 6.85 =

51.85

Here’s the answer 1037/20 51.85

Need help worth 20 points

Answers

Answer:

I believe it's 17.202

Step-by-step explanation:

first Lets add the number of people at the age of 50 and over who have done highschool only and some college.

1942+1057= 2999

then multiply that by 100 divided by the total:total

2999*100/17434=17.20201904

answer 17.202

I would still check though cause i'm not sure if this is correct

Giselle pays $2.70 for 10 pounds of apples at the farmer's market. Torrey pays $4.05 for 15 pounds of apples at the farmer's market. What is the unit cost for apples at the farmer's market?​

Answers

sry Not an answer But did you ever get the answer??

Answer: 0.27

Step-by-step explanation:

If you multiply .27 by 10 $2.70 comes up. And if you multiply .27 by 15 $4.05 comes up

solve 3x-y=7 for x if weird answer will report

Answers

Answer:

x = 1/3y +7/3

Step-by-step explanation:

3x-y=7

Add y to each side

3x-y+y=7+y

3x = y+7

Divide each side by 3

3x/3 = y/3 + 7/3

x = 1/3y +7/3

Answer:

x= 7/3 + y/3

Step-by-step explanation:

divide each term by 3 and simplify

What are all of the factor pairs for 18?

Answers

Answer:

e

Step-by-step explanation:

because it iiiiiiiiiiiiiiis

Answer:

[tex]\huge\boxed{Factor \ Pairs \ Of \ 18 \hookleftarrow}[/tex]

[tex]1 \times 18 = 18 \\ 2 \times 9 = 18 \\ 3 \times 6 = 18 \\ 6 \times 3 = 18 \\ 9 \times 2 = 18 \\ 18 \times 1 = 18[/tex]

So, the factor pairs are :-

1, 182, 93, 6 (option E)

# ꧁❣ RainbowSalt2²2² ࿐

You're picking out water balloons. There are 333 colors and 222 sizes.
If you randomly pick the color and size, which of these tables lists all possible outcomes? (Each row represents one outcome.)
Choose all answers that apply:
Choose all answers that apply:

(Choice A)
A
Table A

(Choice B)
B
Table B
Table A:
Color Size
Green Large
Green Small
Orange Large
Orange Small
Yellow Large
Yellow Small
Table B:
Color Size
Green Large
Orange Large
Yellow Large
Green Small
Orange Small
Yellow Small

Answers

I think chose a might be correct due to the fact that there is more variety of sizes

Answer:

Select both Table A and Table B

Step-by-step explanation:

Both Tables show all 3 colors and 2 possible sizes

For proof here is a screenshot of the answer being correct:

i need someone to help me with my math assignments

Answers

Answer:

okay depending on the question

Answer:

I can try

Step-by-step explanation:

I need help please help ASAP?!?!

Answers

Answer:

C

Step-by-step explanation:

(x²)(x³) = x 2+3

6 + (-3)

6 - 3

3

Answer:

the answer is c

Step-by-step explanation:

2 exponent 6 = 64

2 exponent -3 = .125

64x.125 = 8

2 exponent 3 = 2x2x2 = 8

(i don't know how to write exponents on my computer)

Determine the value of x in the diagram.

Answers

The answer to the question is 114

Someone pls help me I don’t get this

Answers

Answer:

Mode :6 Range :5

Step-by-step explanation

To find the mode look for the number that is repeated the most times. And to find the range subtract the greatest number with the smallest number. Hope this helped :)

Step-by-step explanation

The range is the max value minus the minimum value, which would be 8-3, and that equals 5

and the mode is the number that you see the most in a data set, in this case the mode would be 6 since it is the only number that occurs three times

hope this helped

Find the measure of the indicated angle to the nearest degree

Answers

9514 1404 393

Answer:

  25°

Step-by-step explanation:

The relevant trig relation is ...

  Sin = Opposite/Hypotenuse

  sin(?) = 25/60

  ? = arcsin(25/60) ≈ 24.62°

The indicated angle is about 25°.

7 2/3-(1 2/4+3 6/8) PLS TELL ME THE RIGHT ANSWER!!!!!!!!

Answers

Answer:

The answer should be 29/12 or 2 5/12

Need help asap......

Answers

Answer:

32

Step-by-step explanation:

[tex](2x+20)+3x=180\\5x+20=180\\5x=180-20=160\\x=160/5=32[/tex]

Hey can some some please help me !!!!!

Answers

Answer:

y = x+2

Step-by-step explanation:

proportional relationships are of the form

y = kx where k is a constant

y = x is proportional with k=1

y = 2x is proportional with k =2

y = x+2 is linear

Answer:

y = x+2

Step-by-step explanation:

proportional relationships are of the form

y = kx where k is a constant

y = x is proportional with k=1

y = 2x is proportional with k =2

y = x+2 is linear

Write an equation of a line with the given slope and y-intercept. slope: - 13 y-intercept: –1

Answers

Answer:

y = -13x - 1

General Formulas and Concepts:

Algebra I

Slope-Intercept Form: y = mx + b

m - slope b - y-intercept

Step-by-step explanation:

Step 1: Define

Identify variables

Slope m = -13

y-intercept b = -1

Step 2: Find Equation

Substitute in variables [Slope-Intercept Form]:                                                  y = -13x + -1Simplify:                                                                                                             y = -13x - 1

Find the surface

Record the answer only

Answers

Answer:

150 is the answer

Step-by-step explanation:

2. It takes Samuel 5 hour to walk a mile.
Yesterday, Samuel walked for 13 hours.
Write a multiplication equation that can
be used to find the number of miles
Samuel walked. (Example 1)

Answers

Answer:

Reduce the expression, if possible, by cancelling the common factors.

Exact Form:

13/5

Decimal Form:

2.6

Mixed Number Form:

2 3/5

Step-by-step explanation:

A cylinder whose height is 5 meters has a volume of 320π cubic meters find the radius of the cylinder A.8m b.12.8m c.64m d.201m

Answers

The answer is 64 it’s just dividing the cubic meters by the meters

Marcia drew a quadrilateral with two pairs of parallel sides, four congruent
side lengths, and no right angles. Marcia's quadrilateral can be described as
a ?

Answers

Answer: rhombus but no a square

Step-by-step explanation:

Dorian buys one 32-ounce can of purple paint witha red to blue ratio of 3 to 5. He buys a 25-ouncee can of a different shade of purple paintwith a red to blue ratio of 3 to 2. Dorian mixes the two cans together. What is the ratioof red paint to blue paint in Dorian's new mixture?

Answers

Answer:

9 : 10

Step-by-step explanation:

For 32 ounce- can

Dorian buys one 32-ounce can of purple paint with a red to blue ratio of 3 to 5.

The sum of proportion = 3 + 5 = 8

The number of ounces of red paint = 3/8 × 32-ounce = 12 ounces

The number of ounces of blue paint = 5/8 × 32-ounce = 20 ounces

For 25 ounce can

He buys a 25-ounce can of a different shade of purple paint with a red to blue ratio of 3 to 2.

The sum of proportion = 3 + 2 = 5

The number of ounces of red paint = 3/5 × 25-ounce = 15 ounces

The number of ounces of blue paint = 2/5 × 25-ounce = 10 ounces

Dorian mixes the two cans together.

The total ounces for red paint

= 12 ounces + 15 ounces = 27 ounces

The total ounces for blue paint

= 20 ounces + 10 ounces = 30 ounces

Hence, the ratio of red paint to blue paint in Dorian's new mixture is

Red : Blue

27 ounces : 30 ounces

9 : 10

Which expression is equivalent to (3x2-7) A) (2x2-11)-(x+4) B) (5x²-6)- (2x2-1) C) (10x² - 4)-(7x2+3 D) (15x2 +8)- (18x2+1)

Answers

Answer: (c)

Step-by-step explanation:

Given

The expression is [tex]3x^2-7[/tex]

checking options, for (a)

[tex]\Rightarrow 2x^2-11-x-4\\\Rightarrow 2x^2-x-15[/tex]

option (a) is incorrect

for (b)

[tex]\Rightarrow 5x^2-6-2x^2+1\\\Rightarrow 3x^2-5[/tex]

option(b) is incorrect

for (c)

[tex]\Rightarrow 10x^2-4-7x^2-3\\\Rightarrow 3x^2-7[/tex]

option (c) is matching with the given expression.

Find an equivalent ratio in simplest terms: 22:12 22:12

Answers

Answer:

11:6

Step-by-step explanation:

hope this helps :)

Please help with this question

Answers

Answer:

Step-by-step explanation:

a) A(t) = 6000 * (1.015)^t

b) 6000 * (1.015)^32 = $9661.94

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